The American Academy of Ophthalmology (AAO) clearly states that marijuana is not a safe or effective treatment for glaucoma, despite common misconceptions.
Glaucoma is a serious eye disease in which increased pressure inside the eye (intraocular pressure, or IOP) damages the optic nerve, potentially leading to vision loss or blindness if not properly treated. Lowering IOP is the main goal of glaucoma therapy.
Research has shown that marijuana can temporarily lower eye pressure for a few hours after use. However, this reduction is short-lived and not long enough to offer continuous protection against glaucoma damage. To maintain lowered IOP, marijuana would need to be used repeatedly throughout the day, which is impractical and unsafe.
Short Duration of Effect
Marijuana’s pressure-lowering impact lasts only a few hours at best, and glaucoma requires 24-hour control of eye pressure.
Lack of Evidence for Long-Term Benefit
There’s no scientific proof that marijuana changes the long-term course of glaucoma or protects vision, unlike established glaucoma medications and surgeries.
Potential for Harm
Some cannabis products (like CBD oil) may raise eye pressure, which could actually worsen glaucoma.
Lifestyle factors tied to marijuana use (smoking, systemic effects, impaired coordination) can also bring additional health risks.
Better, Proven Alternatives Exist
Prescription eye drops, lasers and surgical treatments have been scientifically shown to reduce IOP safely and are the standard of care recommended by ophthalmologists.
Marijuana isn’t a viable treatment for glaucoma. Eye doctors advise patients not to self-medicate with cannabis and instead rely on evidence-based therapies that are designed to lower eye pressure consistently and protect vision.
For more information about eye health and how to protect your eyes, visit the Academy’s EyeSmart website.
